Novel Mn4+ doped red phosphors composed of MgAl2O4 and CaAl12O19 phases for light-emitting diodes

2020 ◽  
Vol 49 (11) ◽  
pp. 3606-3614 ◽  
Author(s):  
Yibing Wu ◽  
Yixi Zhuang ◽  
Rong-Jun Xie ◽  
Kaibin Ruan ◽  
Xinhua Ouyang
Keyword(s):  
Plant Growth ◽  
Light Emitting Diodes ◽  
White Led ◽  
Light Emitting ◽  
Red Phosphors

The EL spectra and photographs of the as-obtained plant growth LED and white LED by using CMA:Mn4+ red phosphors.

A low-temperature co-precipitation approach to synthesize fluoride phosphors K2MF6:Mn4+(M = Ge, Si) for white LED applications

2015 ◽  
Vol 3 (8) ◽  
pp. 1655-1660 ◽  
Author(s):  
Ling-Ling Wei ◽  
Chun Che Lin ◽  
Mu-Huai Fang ◽  
Mikhail G. Brik ◽  
Shu-Fen Hu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Alkali Metal ◽  
White Light ◽  
Light Emitting Diodes ◽  
White Led ◽  
Light Emitting ◽  
Red Phosphors ◽  
New Class ◽  
Co Precipitation ◽  
White Light Emitting Diodes

A new class of Mn4+activated alkali-metal hexafluoride red phosphors are emerging for white light-emitting diodes because of their sharp red line2Eg→4A2gemissions (600–650 nm) excited by irradiation of4A2g→4T1g(320–380 nm) and4A2g→4T2g(380–500 nm) transitions.

Superior Stable and High Quantum Yield Phosphor Na2BaSr(PO4)2: Eu2+ for Plant Growth LEDs

2021 ◽  
Author(s):  
Jinmeng Xiang ◽  
Xiaoqi Zhao ◽  
Hao Suo ◽  
Minkun Jin ◽  
Xue Zhou ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Plant Growth ◽  
Light Emitting Diodes ◽  
Light Environment ◽  
High Quantum Yield ◽  
Light Emitting ◽  
Growth Rhythm ◽  
High Quantum ◽  
Violet Light ◽  
Important Means

Controlling the light environment of plant growth using phosphor-converted light-emitting diodes (pc-LEDs) is an important means to regulate the growth rhythm and enhance the yield, in which bluish violet light...

scholarly journals Application of Light-Emitting Diodes for Improving the Nutritional Quality and Bioactive Compound Levels of Some Crops and Medicinal Plants

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1477
Author(s):  
Woo-Suk Jung ◽  
Ill-Min Chung ◽  
Myeong Ha Hwang ◽  
Seung-Hyun Kim ◽  
Chang Yeon Yu ◽  
...  
Keyword(s):  
Plant Growth ◽  
In Vitro Culture ◽  
Light Emitting Diodes ◽  
Photosynthetic Pigment ◽  
Antioxidant Properties ◽  
Light Sources ◽  
Light Emitting ◽  
Cell Defense ◽  
Led Irradiation

Light is a key factor that affects phytochemical synthesis and accumulation in plants. Due to limitations of the environment or cultivated land, there is an urgent need to develop indoor cultivation systems to obtain higher yields with increased phytochemical concentrations using convenient light sources. Light-emitting diodes (LEDs) have several advantages, including consumption of lesser power, longer half-life, higher efficacy, and wider variation in the spectral wavelength than traditional light sources; therefore, these devices are preferred for in vitro culture and indoor plant growth. Moreover, LED irradiation of seedlings enhances plant biomass, nutrient and secondary metabolite levels, and antioxidant properties. Specifically, red and blue LED irradiation exerts strong effects on photosynthesis, stomatal functioning, phototropism, photomorphogenesis, and photosynthetic pigment levels. Additionally, ex vitro plantlet development and acclimatization can be enhanced by regulating the spectral properties of LEDs. Applying an appropriate LED spectral wavelength significantly increases antioxidant enzyme activity in plants, thereby enhancing the cell defense system and providing protection from oxidative damage. Since different plant species respond differently to lighting in the cultivation environment, it is necessary to evaluate specific wavebands before large-scale LED application for controlled in vitro plant growth. This review focuses on the most recent advances and applications of LEDs for in vitro culture organogenesis. The mechanisms underlying the production of different phytochemicals, including phenolics, flavonoids, carotenoids, anthocyanins, and antioxidant enzymes, have also been discussed.

A Simple, Efficient Synthetic Route to Sr2Si5N8:Eu2+-Based Red Phosphors for White Light-Emitting Diodes

2006 ◽  
Vol 18 (23) ◽  
pp. 5578-5583 ◽  
Author(s):  
Rong-Jun Xie ◽  
Naoto Hirosaki ◽  
Takayuki Suehiro ◽  
Fang-Fang Xu ◽  
Mamoru Mitomo
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Synthetic Route ◽  
Light Emitting ◽  
Red Phosphors ◽  
White Light Emitting Diodes

Co-precipitation Synthesis and Luminescence Properties of Na2TiF6∶Mn4+Red Phosphors for Warm White Light Emitting Diodes

2015 ◽  
Vol 36 (12) ◽  
pp. 1402-1408 ◽  
Author(s):  
罗 洋 LUO Yang ◽  
江建青 JIANG Jian-qing ◽  
侯得健 HOU De-jian ◽  
游维雄 YOU Wei-xiong ◽  
叶信宇 YE Xin-yu
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Luminescence Properties ◽  
Light Emitting ◽  
Red Phosphors ◽  
Warm White Light ◽  
Precipitation Synthesis ◽  
Co Precipitation ◽  
White Light Emitting Diodes

Modification of the crystal structure of Sr2−xBaxSi(O,N)4: Eu2+ phosphors to improve their luminescence properties

CrystEngComm ◽  
2015 ◽  
Vol 17 (47) ◽  
pp. 9123-9134 ◽  
Author(s):  
Xiaojun Li ◽  
Youjie Hua ◽  
Hongping Ma ◽  
Degang Deng ◽  
Shiqing Xu
Keyword(s):  
Crystal Structure ◽  
White Light ◽  
Light Emitting Diodes ◽  
Luminescence Properties ◽  
Light Emitting ◽  
Red Phosphors ◽  
White Light Emitting Diodes

A series of Sr1.98−xBaxSi(O,N)4: 0.02Eu2+ (0 ≤ x ≤ 0.5) phosphors were synthesized. We anticipate that these materials can be used as green or red phosphors in white light emitting diodes.

Novel polygonal structure Mn4+ activated In3+-based Elpasolite-type hexafluorides red phosphor for warm white light-emitting diodes (WLEDs)

2019 ◽  
Vol 48 (4) ◽  
pp. 1376-1385 ◽  
Author(s):  
Feng Hong ◽  
Haiming Cheng ◽  
Chao Song ◽  
Guixia Liu ◽  
Wensheng Yu ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Synthetic Methods ◽  
Red Phosphor ◽  
Light Emitting ◽  
White Leds ◽  
Red Phosphors ◽  
Polygonal Structure ◽  
Warm White Light ◽  
White Light Emitting Diodes

Red phosphors (NH4)2NaInF6:Mn4+ with controllable morphology were synthesized via different synthetic methods, which can be fabricated for warm white LEDs.

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